Regensburg 2016 – wissenschaftliches Programm

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KR: Fachgruppe Kristallographie

KR 2: Nano- and microstructured dielectrics / thin films (DF, KR)

KR 2.1: Vortrag

Donnerstag, 10. März 2016, 09:30–09:50, H26

Fabrication of periodically patterned domain structures in x-cut thin film LiNbO₃ — •Peter Mackwitz¹, Michael Rüsing¹, Gerhard Berth^1,2, and Artur Zrenner^1,2 — ¹1Department Physik, Universität Paderborn, 33098 Paderborn, Germany — ²2Center for Optoelectronics and Photonics Paderborn (CeOPP), 33098 Paderborn, Germany

Within the field of nonlinear optics LiNbO₃ represents an important material with outstanding nonlinear optical properties. It is possible to achieve a highly efficient frequency conversion in LiNbO₃ with periodic poled structures which preserve the quasi phase matching condition. Bulk LiNbO₃ represents one of the major materials for frequency conversion with periodically poled pattern. Concerning the different scattering geometries of LiNbO₃ x-cut samples offer favorable properties regarding the fabrication of periodically pattern and the frequency conversion. For example the most intense tensor element d₃₃ can directly be triggered. Scores of previous works [1] have shown the fabrication and application of periodically poled domain pattern in bulk LiNbO₃. In this work we have processed x-cut thin film LiNbO₃ samples in order to create a periodically poled pattern. The transferred domain structures were studied with nonlinear microscopy. Concerning the nonlinear measurements the domain structures could clearly be resolved and the poling process was successful. These results hint to the possibility of homogeneous poled domains allowing novel applications in the framework of photonics and integrated optics. [1] L. Gui, H. Hu et al., Opt. Exp. 17, 3923 (2009)